/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.undertow.websockets.jsr;
import io.undertow.servlet.api.ClassIntrospecter;
import io.undertow.servlet.api.InstanceFactory;
import io.undertow.servlet.api.InstanceHandle;
import io.undertow.servlet.api.ThreadSetupAction;
import io.undertow.servlet.spec.ServletContextImpl;
import io.undertow.servlet.util.ConstructorInstanceFactory;
import io.undertow.servlet.util.ImmediateInstanceHandle;
import io.undertow.util.PathTemplate;
import io.undertow.websockets.WebSocketExtension;
import io.undertow.websockets.client.WebSocketClient;
import io.undertow.websockets.client.WebSocketClientNegotiation;
import io.undertow.websockets.core.WebSocketChannel;
import io.undertow.websockets.core.WebSocketVersion;
import io.undertow.websockets.jsr.annotated.AnnotatedEndpointFactory;
import org.xnio.IoFuture;
import org.xnio.IoUtils;
import org.xnio.OptionMap;
import org.xnio.Pool;
import org.xnio.XnioWorker;
import org.xnio.http.UpgradeFailedException;
import org.xnio.ssl.XnioSsl;
import javax.servlet.DispatcherType;
import javax.websocket.ClientEndpoint;
import javax.websocket.ClientEndpointConfig;
import javax.websocket.CloseReason;
import javax.websocket.DeploymentException;
import javax.websocket.Endpoint;
import javax.websocket.Extension;
import javax.websocket.HandshakeResponse;
import javax.websocket.Session;
import javax.websocket.server.ServerContainer;
import javax.websocket.server.ServerEndpoint;
import javax.websocket.server.ServerEndpointConfig;
import java.io.Closeable;
import java.io.IOException;
import java.net.URI;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.ServiceLoader;
import java.util.Set;
import java.util.TreeMap;
import java.util.TreeSet;
import java.util.concurrent.Executor;
import java.util.concurrent.TimeUnit;
/**
* {@link ServerContainer} implementation which allows to deploy endpoints for a server.
*
* @author <a href="mailto:nmaurer@redhat.com">Norman Maurer</a>
*/
public class ServerWebSocketContainer implements ServerContainer, Closeable {
public static final String TIMEOUT = "io.undertow.websocket.CONNECT_TIMEOUT";
public static final int DEFAULT_WEB_SOCKET_TIMEOUT_SECONDS = 10;
private final ClassIntrospecter classIntrospecter;
private final Map<Class<?>, ConfiguredClientEndpoint> clientEndpoints = new HashMap<>();
private final List<ConfiguredServerEndpoint> configuredServerEndpoints = new ArrayList<>();
/**
* set of all deployed server endpoint paths. Due to the comparison function we can detect
* overlaps
*/
private final TreeSet<PathTemplate> seenPaths = new TreeSet<>();
private final XnioWorker xnioWorker;
private final Pool<ByteBuffer> bufferPool;
private final ThreadSetupAction threadSetupAction;
private final boolean dispatchToWorker;
private volatile long defaultAsyncSendTimeout;
private volatile long defaultMaxSessionIdleTimeout;
private volatile int defaultMaxBinaryMessageBufferSize;
private volatile int defaultMaxTextMessageBufferSize;
private volatile boolean deploymentComplete = false;
private ServletContextImpl contextToAddFilter = null;
private final List<WebsocketClientSslProvider> clientSslProviders;
public ServerWebSocketContainer(final ClassIntrospecter classIntrospecter, final XnioWorker xnioWorker, Pool<ByteBuffer> bufferPool, ThreadSetupAction threadSetupAction, boolean dispatchToWorker, boolean clientMode) {
this(classIntrospecter, ServerWebSocketContainer.class.getClassLoader(), xnioWorker, bufferPool, threadSetupAction, dispatchToWorker);
}
public ServerWebSocketContainer(final ClassIntrospecter classIntrospecter, final ClassLoader classLoader, XnioWorker xnioWorker, Pool<ByteBuffer> bufferPool, ThreadSetupAction threadSetupAction, boolean dispatchToWorker) {
this.classIntrospecter = classIntrospecter;
this.bufferPool = bufferPool;
this.xnioWorker = xnioWorker;
this.threadSetupAction = threadSetupAction;
this.dispatchToWorker = dispatchToWorker;
List<WebsocketClientSslProvider> clientSslProviders = new ArrayList<>();
for (WebsocketClientSslProvider provider : ServiceLoader.load(WebsocketClientSslProvider.class, classLoader)) {
clientSslProviders.add(provider);
}
this.clientSslProviders = Collections.unmodifiableList(clientSslProviders);
}
@Override
public long getDefaultAsyncSendTimeout() {
return defaultAsyncSendTimeout;
}
@Override
public void setAsyncSendTimeout(long defaultAsyncSendTimeout) {
this.defaultAsyncSendTimeout = defaultAsyncSendTimeout;
}
@Override
public Session connectToServer(final Object annotatedEndpointInstance, final URI path) throws DeploymentException, IOException {
ConfiguredClientEndpoint config = getClientEndpoint(annotatedEndpointInstance.getClass(), false);
if (config == null) {
throw JsrWebSocketMessages.MESSAGES.notAValidClientEndpointType(annotatedEndpointInstance.getClass());
}
Endpoint instance = config.getFactory().createInstance(new ImmediateInstanceHandle<Object>(annotatedEndpointInstance));
XnioSsl ssl = null;
for (WebsocketClientSslProvider provider : clientSslProviders) {
ssl = provider.getSsl(xnioWorker, annotatedEndpointInstance, path);
if (ssl != null) {
break;
}
}
return connectToServerInternal(instance, ssl, config, path);
}
@Override
public Session connectToServer(Class<?> aClass, URI uri) throws DeploymentException, IOException {
ConfiguredClientEndpoint config = getClientEndpoint(aClass, true);
if (config == null) {
throw JsrWebSocketMessages.MESSAGES.notAValidClientEndpointType(aClass);
}
try {
AnnotatedEndpointFactory factory = config.getFactory();
InstanceHandle<?> instance = config.getInstanceFactory().createInstance();
XnioSsl ssl = null;
for (WebsocketClientSslProvider provider : clientSslProviders) {
ssl = provider.getSsl(xnioWorker, aClass, uri);
if (ssl != null) {
break;
}
}
return connectToServerInternal(factory.createInstance(instance), ssl, config, uri);
} catch (InstantiationException e) {
throw new RuntimeException(e);
}
}
@Override
public Session connectToServer(final Endpoint endpointInstance, final ClientEndpointConfig config, final URI path) throws DeploymentException, IOException {
ClientEndpointConfig cec = config != null ? config : ClientEndpointConfig.Builder.create().build();
//in theory we should not be able to connect until the deployment is complete, but the definition of when a deployment is complete is a bit nebulous.
WebSocketClientNegotiation clientNegotiation = new ClientNegotiation(cec.getPreferredSubprotocols(), toExtensionList(cec.getExtensions()), cec);
XnioSsl ssl = null;
for (WebsocketClientSslProvider provider : clientSslProviders) {
ssl = provider.getSsl(xnioWorker, endpointInstance, cec, path);
if (ssl != null) {
break;
}
}
IoFuture<WebSocketChannel> session = WebSocketClient.connect(xnioWorker, ssl, bufferPool, OptionMap.EMPTY, path, WebSocketVersion.V13, clientNegotiation);
Number timeout = (Number) cec.getUserProperties().get(TIMEOUT);
if(session.await(timeout == null ? DEFAULT_WEB_SOCKET_TIMEOUT_SECONDS: timeout.intValue(), TimeUnit.SECONDS) == IoFuture.Status.WAITING) {
//add a notifier to close the channel if the connection actually completes
session.cancel();
session.addNotifier(new IoFuture.HandlingNotifier<WebSocketChannel, Object>() {
@Override
public void handleDone(WebSocketChannel data, Object attachment) {
IoUtils.safeClose(data);
}
}, null);
throw JsrWebSocketMessages.MESSAGES.connectionTimedOut();
}
WebSocketChannel channel;
try {
channel = session.get();
} catch (UpgradeFailedException e) {
throw new DeploymentException(e.getMessage(), e);
}
EndpointSessionHandler sessionHandler = new EndpointSessionHandler(this);
final List<Extension> extensions = new ArrayList<>();
final Map<String, Extension> extMap = new HashMap<>();
for (Extension ext : cec.getExtensions()) {
extMap.put(ext.getName(), ext);
}
for (WebSocketExtension e : clientNegotiation.getSelectedExtensions()) {
Extension ext = extMap.get(e.getName());
if (ext == null) {
throw JsrWebSocketMessages.MESSAGES.extensionWasNotPresentInClientHandshake(e.getName(), clientNegotiation.getSupportedExtensions());
}
extensions.add(ExtensionImpl.create(e));
}
EncodingFactory encodingFactory = EncodingFactory.createFactory(classIntrospecter, cec.getDecoders(), cec.getEncoders());
UndertowSession undertowSession = new UndertowSession(channel, path, Collections.<String, String>emptyMap(), Collections.<String, List<String>>emptyMap(), sessionHandler, null, new ImmediateInstanceHandle<>(endpointInstance), cec, path.getQuery(), encodingFactory.createEncoding(cec), new HashSet<Session>(), clientNegotiation.getSelectedSubProtocol(), extensions);
endpointInstance.onOpen(undertowSession, cec);
channel.resumeReceives();
return undertowSession;
}
@Override
public Session connectToServer(final Class<? extends Endpoint> endpointClass, final ClientEndpointConfig cec, final URI path) throws DeploymentException, IOException {
try {
Endpoint endpoint = endpointClass.newInstance();
return connectToServer(endpoint, cec, path);
} catch (InstantiationException e) {
throw new RuntimeException(e);
} catch (IllegalAccessException e) {
throw new RuntimeException(e);
}
}
private Session connectToServerInternal(final Endpoint endpointInstance, XnioSsl ssl, final ConfiguredClientEndpoint cec, final URI path) throws DeploymentException, IOException {
//in theory we should not be able to connect until the deployment is complete, but the definition of when a deployment is complete is a bit nebulous.
WebSocketClientNegotiation clientNegotiation = new ClientNegotiation(cec.getConfig().getPreferredSubprotocols(), toExtensionList(cec.getConfig().getExtensions()), cec.getConfig());
IoFuture<WebSocketChannel> session = WebSocketClient.connect(xnioWorker, ssl, bufferPool, OptionMap.EMPTY, path, WebSocketVersion.V13, clientNegotiation); //TODO: fix this
Number timeout = (Number) cec.getConfig().getUserProperties().get(TIMEOUT);
IoFuture.Status result = session.await(timeout == null ? DEFAULT_WEB_SOCKET_TIMEOUT_SECONDS : timeout.intValue(), TimeUnit.SECONDS);
if(result == IoFuture.Status.WAITING) {
//add a notifier to close the channel if the connection actually completes
session.cancel();
session.addNotifier(new IoFuture.HandlingNotifier<WebSocketChannel, Object>() {
@Override
public void handleDone(WebSocketChannel data, Object attachment) {
IoUtils.safeClose(data);
}
}, null);
throw JsrWebSocketMessages.MESSAGES.connectionTimedOut();
}
WebSocketChannel channel;
try {
channel = session.get();
} catch (UpgradeFailedException e) {
throw new DeploymentException(e.getMessage(), e);
}
EndpointSessionHandler sessionHandler = new EndpointSessionHandler(this);
final List<Extension> extensions = new ArrayList<>();
final Map<String, Extension> extMap = new HashMap<>();
for (Extension ext : cec.getConfig().getExtensions()) {
extMap.put(ext.getName(), ext);
}
for (WebSocketExtension e : clientNegotiation.getSelectedExtensions()) {
Extension ext = extMap.get(e.getName());
if (ext == null) {
throw JsrWebSocketMessages.MESSAGES.extensionWasNotPresentInClientHandshake(e.getName(), clientNegotiation.getSupportedExtensions());
}
extensions.add(ExtensionImpl.create(e));
}
UndertowSession undertowSession = new UndertowSession(channel, path, Collections.<String, String>emptyMap(), Collections.<String, List<String>>emptyMap(), sessionHandler, null, new ImmediateInstanceHandle<>(endpointInstance), cec.getConfig(), path.getQuery(), cec.getEncodingFactory().createEncoding(cec.getConfig()), new HashSet<Session>(), clientNegotiation.getSelectedSubProtocol(), extensions);
endpointInstance.onOpen(undertowSession, cec.getConfig());
channel.resumeReceives();
return undertowSession;
}
@Override
public long getDefaultMaxSessionIdleTimeout() {
return defaultMaxSessionIdleTimeout;
}
@Override
public void setDefaultMaxSessionIdleTimeout(final long timeout) {
this.defaultMaxSessionIdleTimeout = timeout;
}
@Override
public int getDefaultMaxBinaryMessageBufferSize() {
return defaultMaxBinaryMessageBufferSize;
}
@Override
public void setDefaultMaxBinaryMessageBufferSize(int defaultMaxBinaryMessageBufferSize) {
this.defaultMaxBinaryMessageBufferSize = defaultMaxBinaryMessageBufferSize;
}
@Override
public int getDefaultMaxTextMessageBufferSize() {
return defaultMaxTextMessageBufferSize;
}
@Override
public void setDefaultMaxTextMessageBufferSize(int defaultMaxTextMessageBufferSize) {
this.defaultMaxTextMessageBufferSize = defaultMaxTextMessageBufferSize;
}
@Override
public Set<Extension> getInstalledExtensions() {
return Collections.emptySet();
}
/**
* Runs a web socket invocation, setting up the threads and dispatching a thread pool
* <p/>
* Unfortunately we need to dispatch to a thread pool, because there is a good chance that the endpoint
* will use blocking IO methods. We suspend recieves while this is in progress, to make sure that we do not have multiple
* methods invoked at once.
* <p/>
*
* @param invocation The task to run
*/
public void invokeEndpointMethod(final Executor executor, final Runnable invocation) {
if (dispatchToWorker) {
executor.execute(new Runnable() {
@Override
public void run() {
invokeEndpointMethod(invocation);
}
});
} else {
invokeEndpointMethod(invocation);
}
}
/**
* Directly invokes an endpoint method, without dispatching to an executor
* @param invocation The invocation
*/
public void invokeEndpointMethod(final Runnable invocation) {
ThreadSetupAction.Handle handle = threadSetupAction.setup(null);
try {
invocation.run();
} finally {
handle.tearDown();
}
}
@Override
public void addEndpoint(final Class<?> endpoint) throws DeploymentException {
if (deploymentComplete) {
throw JsrWebSocketMessages.MESSAGES.cannotAddEndpointAfterDeployment();
}
addEndpointInternal(endpoint, true);
}
private void addEndpointInternal(final Class<?> endpoint, boolean requiresCreation) throws DeploymentException {
ServerEndpoint serverEndpoint = endpoint.getAnnotation(ServerEndpoint.class);
ClientEndpoint clientEndpoint = endpoint.getAnnotation(ClientEndpoint.class);
if (serverEndpoint != null) {
JsrWebSocketLogger.ROOT_LOGGER.addingAnnotatedServerEndpoint(endpoint, serverEndpoint.value());
final PathTemplate template = PathTemplate.create(serverEndpoint.value());
if (seenPaths.contains(template)) {
PathTemplate existing = null;
for (PathTemplate p : seenPaths) {
if (p.compareTo(template) == 0) {
existing = p;
break;
}
}
throw JsrWebSocketMessages.MESSAGES.multipleEndpointsWithOverlappingPaths(template, existing);
}
seenPaths.add(template);
EncodingFactory encodingFactory = EncodingFactory.createFactory(classIntrospecter, serverEndpoint.decoders(), serverEndpoint.encoders());
AnnotatedEndpointFactory annotatedEndpointFactory = AnnotatedEndpointFactory.create(endpoint, encodingFactory, template.getParameterNames());
InstanceFactory<?> instanceFactory = null;
try {
instanceFactory = classIntrospecter.createInstanceFactory(endpoint);
} catch (NoSuchMethodException e) {
throw JsrWebSocketMessages.MESSAGES.couldNotDeploy(e);
}
Class<? extends ServerEndpointConfig.Configurator> configuratorClass = serverEndpoint.configurator();
ServerEndpointConfig.Configurator configurator;
if (configuratorClass != ServerEndpointConfig.Configurator.class) {
try {
configurator = configuratorClass.newInstance();
} catch (InstantiationException | IllegalAccessException e) {
throw JsrWebSocketMessages.MESSAGES.couldNotDeploy(e);
}
} else {
configurator = DefaultContainerConfigurator.INSTANCE;
}
ServerEndpointConfig config = ServerEndpointConfig.Builder.create(endpoint, serverEndpoint.value())
.decoders(Arrays.asList(serverEndpoint.decoders()))
.encoders(Arrays.asList(serverEndpoint.encoders()))
.subprotocols(Arrays.asList(serverEndpoint.subprotocols()))
.configurator(configurator)
.build();
ConfiguredServerEndpoint confguredServerEndpoint = new ConfiguredServerEndpoint(config, instanceFactory, template, encodingFactory, annotatedEndpointFactory);
configuredServerEndpoints.add(confguredServerEndpoint);
handleAddingFilterMapping();
} else if (clientEndpoint != null) {
JsrWebSocketLogger.ROOT_LOGGER.addingAnnotatedClientEndpoint(endpoint);
EncodingFactory encodingFactory = EncodingFactory.createFactory(classIntrospecter, clientEndpoint.decoders(), clientEndpoint.encoders());
InstanceFactory<?> instanceFactory;
try {
instanceFactory = classIntrospecter.createInstanceFactory(endpoint);
} catch (Exception e) {
try {
instanceFactory = new ConstructorInstanceFactory<>(endpoint.getConstructor()); //this endpoint cannot be created by the container, the user will instantiate it
} catch (NoSuchMethodException e1) {
if(requiresCreation) {
throw JsrWebSocketMessages.MESSAGES.couldNotDeploy(e);
} else {
instanceFactory = new InstanceFactory<Object>() {
@Override
public InstanceHandle<Object> createInstance() throws InstantiationException {
throw new InstantiationException();
}
};
}
}
}
AnnotatedEndpointFactory factory = AnnotatedEndpointFactory.create(endpoint, encodingFactory, Collections.<String>emptySet());
ClientEndpointConfig.Configurator configurator = null;
try {
configurator = clientEndpoint.configurator().newInstance();
} catch (InstantiationException | IllegalAccessException e) {
throw JsrWebSocketMessages.MESSAGES.couldNotDeploy(e);
}
ClientEndpointConfig config = ClientEndpointConfig.Builder.create()
.decoders(Arrays.asList(clientEndpoint.decoders()))
.encoders(Arrays.asList(clientEndpoint.encoders()))
.preferredSubprotocols(Arrays.asList(clientEndpoint.subprotocols()))
.configurator(configurator)
.build();
ConfiguredClientEndpoint configuredClientEndpoint = new ConfiguredClientEndpoint(config, factory, encodingFactory, instanceFactory);
clientEndpoints.put(endpoint, configuredClientEndpoint);
} else {
throw JsrWebSocketMessages.MESSAGES.classWasNotAnnotated(endpoint);
}
}
private void handleAddingFilterMapping() {
if (contextToAddFilter != null) {
contextToAddFilter.getDeployment().getDeploymentInfo().addFilterUrlMapping(Bootstrap.FILTER_NAME, "/*", DispatcherType.REQUEST);
contextToAddFilter.getDeployment().getServletPaths().invalidate();
contextToAddFilter = null;
}
}
@Override
public void addEndpoint(final ServerEndpointConfig endpoint) throws DeploymentException {
if (deploymentComplete) {
throw JsrWebSocketMessages.MESSAGES.cannotAddEndpointAfterDeployment();
}
JsrWebSocketLogger.ROOT_LOGGER.addingProgramaticEndpoint(endpoint.getEndpointClass(), endpoint.getPath());
final PathTemplate template = PathTemplate.create(endpoint.getPath());
if (seenPaths.contains(template)) {
PathTemplate existing = null;
for (PathTemplate p : seenPaths) {
if (p.compareTo(template) == 0) {
existing = p;
break;
}
}
throw JsrWebSocketMessages.MESSAGES.multipleEndpointsWithOverlappingPaths(template, existing);
}
seenPaths.add(template);
EncodingFactory encodingFactory = EncodingFactory.createFactory(classIntrospecter, endpoint.getDecoders(), endpoint.getEncoders());
ConfiguredServerEndpoint confguredServerEndpoint = new ConfiguredServerEndpoint(endpoint, null, template, encodingFactory, null);
configuredServerEndpoints.add(confguredServerEndpoint);
handleAddingFilterMapping();
}
private ConfiguredClientEndpoint getClientEndpoint(final Class<?> endpointType, boolean requiresCreation) {
Class<?> type = endpointType;
while (type != Object.class && type != null && !type.isAnnotationPresent(ClientEndpoint.class)) {
type = type.getSuperclass();
}
if(type == Object.class || type == null) {
return null;
}
ConfiguredClientEndpoint existing = clientEndpoints.get(type);
if (existing != null) {
return existing;
}
synchronized (this) {
existing = clientEndpoints.get(type);
if (existing != null) {
return existing;
}
if (type.isAnnotationPresent(ClientEndpoint.class)) {
try {
addEndpointInternal(type, requiresCreation);
return clientEndpoints.get(type);
} catch (DeploymentException e) {
throw new RuntimeException(e);
}
}
return null;
}
}
public void deploymentComplete() {
deploymentComplete = true;
}
public List<ConfiguredServerEndpoint> getConfiguredServerEndpoints() {
return configuredServerEndpoints;
}
public ServletContextImpl getContextToAddFilter() {
return contextToAddFilter;
}
public void setContextToAddFilter(ServletContextImpl contextToAddFilter) {
this.contextToAddFilter = contextToAddFilter;
}
@Override
public synchronized void close() {
for (ConfiguredServerEndpoint endpoint : configuredServerEndpoints) {
for (Session session : endpoint.getOpenSessions()) {
try {
session.close(new CloseReason(CloseReason.CloseCodes.GOING_AWAY, ""));
} catch (Exception e) {
JsrWebSocketLogger.ROOT_LOGGER.couldNotCloseOnUndeploy(e);
}
}
}
}
public Pool<ByteBuffer> getBufferPool() {
return bufferPool;
}
public XnioWorker getXnioWorker() {
return xnioWorker;
}
private static List<WebSocketExtension> toExtensionList(final List<Extension> extensions) {
List<WebSocketExtension> ret = new ArrayList<>();
for (Extension e : extensions) {
final List<WebSocketExtension.Parameter> parameters = new ArrayList<>();
for (Extension.Parameter p : e.getParameters()) {
parameters.add(new WebSocketExtension.Parameter(p.getName(), p.getValue()));
}
ret.add(new WebSocketExtension(e.getName(), parameters));
}
return ret;
}
private class ClientNegotiation extends WebSocketClientNegotiation {
private final ClientEndpointConfig config;
public ClientNegotiation(List<String> supportedSubProtocols, List<WebSocketExtension> supportedExtensions, ClientEndpointConfig config) {
super(supportedSubProtocols, supportedExtensions);
this.config = config;
}
@Override
public void afterRequest(final Map<String, List<String>> headers) {
ClientEndpointConfig.Configurator configurator = config.getConfigurator();
if (configurator != null) {
final Map<String, List<String>> newHeaders = new TreeMap<>(String.CASE_INSENSITIVE_ORDER);
for (Map.Entry<String, List<String>> entry : headers.entrySet()) {
ArrayList<String> arrayList = new ArrayList<>();
arrayList.addAll(entry.getValue());
newHeaders.put(entry.getKey(), arrayList);
}
configurator.afterResponse(new HandshakeResponse() {
@Override
public Map<String, List<String>> getHeaders() {
return newHeaders;
}
});
}
}
@Override
public void beforeRequest(Map<String, List<String>> headers) {
ClientEndpointConfig.Configurator configurator = config.getConfigurator();
if (configurator != null) {
final Map<String, List<String>> newHeaders = new HashMap<>();
for (Map.Entry<String, List<String>> entry : headers.entrySet()) {
ArrayList<String> arrayList = new ArrayList<>();
arrayList.addAll(entry.getValue());
newHeaders.put(entry.getKey(), arrayList);
}
configurator.beforeRequest(newHeaders);
headers.clear(); //TODO: more efficient way
for (Map.Entry<String, List<String>> entry : newHeaders.entrySet()) {
if (!entry.getValue().isEmpty()) {
headers.put(entry.getKey(), entry.getValue());
}
}
}
}
}
}